Optimizing the procedure for equal-channel angular pressing for maximum superplasticity
Optimizing the procedure for equal-channel angular pressing for maximum superplasticity
The imposition of severe plastic straining on an Al–3% Mg–0.2% Sc alloy through equal-channel angular pressing (ECAP) reduces the grain size to ca. 0.2 ?m and provides an opportunity to achieve superplastic elongations at high strain rates. Experiments were conducted to evaluate the procedure for optimizing the ECAP process in order to attain maximum superplastic ductilities. The results show that: (i) high elongations are achieved only after each sample has been subjected to a sufficiently high strain to establish a homogeneous array of grains separated by high angle boundaries and (ii) elongations are a maximum when using processing route BC in which the sample is rotated by 90° in the same sense between each consecutive pressing through the ECAP die.
111-118
Komura, S.
ed6e34ef-beb3-45d4-9836-dfc3bdbdafce
Furukawa, M.
8ea754fa-cd31-481d-b6b7-6a6968b1ee0e
Horita, Z.
84a80017-cbaf-4713-8346-6f69ac7ea63e
Nemoto, M.
37afe672-c5b3-4566-a16b-42e031d64b2d
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2001
Komura, S.
ed6e34ef-beb3-45d4-9836-dfc3bdbdafce
Furukawa, M.
8ea754fa-cd31-481d-b6b7-6a6968b1ee0e
Horita, Z.
84a80017-cbaf-4713-8346-6f69ac7ea63e
Nemoto, M.
37afe672-c5b3-4566-a16b-42e031d64b2d
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Komura, S., Furukawa, M., Horita, Z., Nemoto, M. and Langdon, T.G.
(2001)
Optimizing the procedure for equal-channel angular pressing for maximum superplasticity.
Materials Science and Engineering: A, 297 (1-3), .
(doi:10.1016/S0921-5093(00)01255-7).
Abstract
The imposition of severe plastic straining on an Al–3% Mg–0.2% Sc alloy through equal-channel angular pressing (ECAP) reduces the grain size to ca. 0.2 ?m and provides an opportunity to achieve superplastic elongations at high strain rates. Experiments were conducted to evaluate the procedure for optimizing the ECAP process in order to attain maximum superplastic ductilities. The results show that: (i) high elongations are achieved only after each sample has been subjected to a sufficiently high strain to establish a homogeneous array of grains separated by high angle boundaries and (ii) elongations are a maximum when using processing route BC in which the sample is rotated by 90° in the same sense between each consecutive pressing through the ECAP die.
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Published date: 2001
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Local EPrints ID: 23378
URI: http://eprints.soton.ac.uk/id/eprint/23378
PURE UUID: d6535f83-40ed-4b0c-b307-6c1e7929bab9
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Date deposited: 23 Mar 2006
Last modified: 16 Mar 2024 03:27
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Author:
S. Komura
Author:
M. Furukawa
Author:
Z. Horita
Author:
M. Nemoto
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